Corsair XMS Xpert RAM
Performance @ 2-2-2-5
Next, we continued testing with SiSoftware's SANDRA, the System ANalyzer, Diagnostic and Reporting Assistant, but we manually set the memory timings on the Corsair TWINXP1024-3200XL modules to 2-2-2-5 (CAS Latency = 2T, RAS to CAS Delay (tRCD) = 2T, Row Precharge (tRP) = 2T, Active to Precharge Delay (tRAS) = 5T). Then we raised our system's HTT clock until it was no longer stable. Our goal was to find the maximum stable clock speed that the XPert modules could attain, without issue. For the sake of comparison, we did the same with our reference Kingston and Corsair Pro modules as well. (Note: The Kingston modules were run at 2.5-3-3-8 timings) For all of our overclocking tests, we cranked the memory voltage up to 2.9v via the system BIOS.
With the memory timings still set at 2-2-2-5, we were able to hit a maximum stable clock speed of 220MHz (DDR440) with the Corsair XMS Xpert memory kit. This speed matched what the Corsair Pro modules could do at the same timings. The extra 20MHz equated to roughly a .5GB/s increase in available bandwidth in both the Integer and Floating Point portions of SANDRA's memory benchmark.